Film transport mechanism

ABSTRACT

Combination viewing and printing apparatus characterized by the capability of: producing a positive print from either a negative or a positive input film; printing on plain sheet paper which is fed from the apparatus at an optimum location; selecting the information to be printed from a microfilm transported by means of a differential drive arrangement which optimizes the film movement; accommodating various types of recording media, for example roll microfilm and microfiche; and presenting a plurality of image formats to the viewing screen and a recording media in a predetermined orientation convenient for viewing and printing.

[4 1 July 29, 1975 United States Patent [191 Smith 3,564,209 2/1971Loughnane........................... 353/26 FILM TRANSPORT MECHANISM[75] Inventor: Charles E. Smith, Webster, NY.

Xerox Corporation, Stamford, Conn.

Primary ExaminerWilliam D. Martin, Jr.

[73] Assignee:

[57] ABSTRACT Combination viewing and printing apparatus charac- [22]Filed: Sept. 18, 1970 502 2 93 0 2 311 52 b w 3 2 0 7/ O 52 2G24 ,2 M162 313 625 fib 33" 50 Gm 9 mmm "w WM" 3 7 mma E 0 N .L hf C m. d S .l PMk A UIF H. N H 2 555 l. [[1

film movement accommodating various types of recording media, forexample roll microfil m and microfiche; and presenting a plurality ofimage formats to the viewing screen and a recording media in apredetermined orientation convenient for viewing and printing.

References Cited UNITED STATES PATENTS 242/202 22 Claims, 33 DrawingFigures 2,412,551 Pratt et a]. 2,954,939 10/1960 Herrrnann...

3,290,987 12/1966 James et al. 3,327,958 6/1967 SHEET PATENTEB JUL 2 9I975 INVENTOR. CHARLES E. SMITH PATENTED JUL 2 91975 SHEET PATENTED 5 3,897, 146

SHEET 3 FIG. 4

PATENTEI] JUL 2 9 I975 SHEET FIG. 5

I70 170 7.? f i I FIG. 6

PATENTED JUL 2 9 I975 SHEET PATENTEUJULZQIHYE 3, 897, 146

sum 6 267 279 y 266 Wfi -J FIG. /3

PATENTEB JUL 2 9 I975 SHEET QQN PATENTED JUL 2 91975 SHEET FIG: /4

SHEET PATENTED JUL29 197s PATENTED JUL 2 91975 SHEET PATENTED JUL 291975 sum 14 PATENTEDJULZSISYS SHEET Nmm PATENTEDJULZSIHYS CHARGE MOTORON COROTRON ON MER P08 (4) EXPOSURE LAMP ON DELAY CKT MER P08 (3)DEVELOP MOTOR ON COROTRON ON MER P08 (4) DEVELOP MOTOR ON COROTRON ONMER P08 (5) REVERSE DELAY DELAY CKT MER P08 (6) TRANSFER MOTOR ON CLUTCHON MER P08 (7) TRANSFER MOTOR ON MER P08 (8) STOP MOTOR DELAY CKT MERP08 (9) RESET MER posuo)

1. Film viewing apparatus comprising; housing structure; a viewingscreen in one wall of said housing structure; means for projecting animage onto said screen; means for supporting film for movement past saidprojecting means; differential speed means for imparting movement tosaid support means for causing movement of said film past saidprojecting means; a first reel and drive means therefor; a second reeland drive means therefor; motion transfer means operably coupled to saidspeed differential means for imparting a driving motion to one or theother of said drive means; said speed differential means comprising apair of motors and associated output shafts cooperating with means forproducing a differential output representative of the difference betweenthe speeds of said motors.
 2. Apparatus according to claim 1 including,switch means and cam actuator for establishing an electrical circuit tosaid motors.
 3. Structure as specified in claim 2 including, means forselectively varying the speed of one of said motors.
 4. Structure asspecified in claim 3 wherein, said speed varying means comprises meansfor applying a frictional force to one of the other of the output shaftsof said motors.
 5. Structure as specified in claim 4 wherein, said meansfor rendering said motion transfer means operable comprises a frictiondrive arrangement.
 6. Structure as specified in claim 5 wherein, saidfriction drive arrangement comprises a rotatable shaft and a frictionwheel supported thereon, means for effecting shifting of said wheellongitudinally on said shaft to effect engagement of said wheel witheither the drive means for said first reel or said second reel dependingupon direction of rotation of said shaft.
 7. Structure as specified inclaim 6 wherein, said reels and drive means therefor comprise a modularconstruction readily removable from said housing structure forinstallation of another modular film structure.
 8. Structure asspecified in claim 7 wherein, said housing structure is provided with apair of opposed grooves for receiving flanges of said modularconstruction and means for positioning said modular construction in anumber of positions along the longitudinal extent of said opposedgrooves.
 9. Structure as specified in claim 8 wherein, said positioningmeans comprises a pair of arms having segments thereof extending intosaid grooves for engagement with the bottom walls thereof, and means forbiasing said arm segments into frictional engagement with said bottomwalls.
 10. Film transporting mechanism comprising; first reel supportingmeans including a drive therefor; second film supporting means and drivemeans therefor; motion transfer means for actuating one or the other ofsaid drive means; speed differential output means for imparting motionto said transfer means, said output means comprising a pair of motorsand a differential gear train; and means for varying the speed of one ofsaid motors to produce a difference of speed therebetween.
 11. Structureas specified in claim 10 wherein, said speed varying means comprisesfrictional braking means cooperating with the output shaft of one ofsaid motors.
 12. Structure as specified in claim 11 wherein, said motiontransfer means comprises a frictional drive arrangement.
 13. Structureas specified in claim 12 wherein, said friction drive arrangementcomprises a rotatable shaft and friction wheel means supported thereby;and means for effecting shifting of said wheel longitudinally on saidshaft to effect engagement of said wheel with one or the other of saiddrive means depending upon the direction of rotation of said shaft. 14.Structure as specified in claim 1 wherein, said film supportinG meansand drives therefor and said motion transfer mechanism comprise amodular construction readily separable from said speed differentialoutput means.
 15. Film viewing apparatus comprising: housing structure;a viewing screen in one wall of said housing structure; means forprojecting an image onto said screen; differential speed meanscomprising a pair of motors and associated output shafts cooperatingwith means for producing a differential output representative of thedifference between the speeds of said motors; means supporting film formovement past said projecting means, said supporting means comprisingfirst and second reels and drive means therefor selectively engageablewith a motion transfer member coupled to said differential speed meansfor imparting driving motion to one or the other of said reels; meansfor selectively varying the speed of one or the other of said motors;and switch and cam means for establishing an electrical circuit to powersaid motors.
 16. Apparatus according to claim 15 wherein said switch andcam means comprises a pair of switches, one for each motor and said camis so constructed as to effect simultaneous energization of said motorsand cooperating with said means for selectively varying the speed of oneor the other of said motors to produce a low speed output with bothmotors running and then a high speed output with only one motorenergized.
 17. Structure as specified in claim 16 wherein, said speedvarying means comprises means for applying a frictional force to one ofthe other of the output shafts of said motors.
 18. Structure asspecified in claim 17 wherein, said means for rendering said motiontransfer means operable, comprises a friction drive arrangement. 19.Structure as specified in claim 18 wherein, said friction drivearrangement comprises a rotatable shaft and a friction wheel supportedthereon, means for effecting shifting of said wheel longitudinally onsaid shaft to effect engagement of said wheel with either the drivemeans for said first reel or said second reel depending upon directionof rotation of said shaft.
 20. Structure as specified in claim 19wherein, said reels and drive means therefor comprise a modularconstruction readily removable from said housing structure forinstallation of another modular film structure.
 21. Structure asspecified in claim 20 wherein, said housing structure is provided with apair of opposed grooves for receiving flanges of said modularconstruction and means for positioning said modular construction in anumber of positions along the longitudinal extent of said opposedgrooves.
 22. Structure as specified in claim 21 wherein, saidpositioning means comprises a pair of arms having segments thereofextending into said grooves for engagement with the bottom wallsthereof, and means for biasing said arm segments into frictionalengagement with said bottom walls.